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src/MatrixTools.js

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+/*
+Copyright 2015 OpenMarket Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+var MatrixClientPeg = require('./MatrixClientPeg');
+
+module.exports = {
+    /**
+     * Given a room object, return the canonical alias for it
+     * if there is one. Otherwise return null;
+     */
+    getCanonicalAliasForRoom: function(room) {
+        var aliasEvents = room.currentState.getStateEvents(
+            "m.room.aliases"
+        );
+        // Canonical aliases aren't implemented yet, so just return the first
+        for (var j = 0; j < aliasEvents.length; j++) {
+            var aliases = aliasEvents[j].getContent().aliases;
+            if (aliases && aliases.length) {
+                return aliases[0];
+            }
+        }
+        return null;
+    }
+}
+